Nginx负载均衡与反向代理的配置实例

user  www www;

worker_processes 10;

error_log  /data1/logs/nginx_error.log  crit;

pid        /usr/local/webserver/nginx/nginx.pid;

worker_rlimit_nofile 51200;

events
{
use epoll;
worker_connections 51200;
}

http
{
include       mime.types;
default_type  application/octet-stream;

#charset  utf-8;

server_names_hash_bucket_size 128;
client_header_buffer_size 32k;
large_client_header_buffers 4 32k;

sendfile on;
#tcp_nopush     on;

keepalive_timeout 65;

tcp_nodelay on;

fastcgi_connect_timeout 300;
fastcgi_send_timeout 300;
fastcgi_read_timeout 300;
fastcgi_buffer_size 64k;
fastcgi_buffers 4 64k;
fastcgi_busy_buffers_size 128k;
fastcgi_temp_file_write_size 128k;

gzip on;
gzip_min_length  1k;
gzip_buffers     4 16k;
gzip_http_version 1.1;
gzip_comp_level 2;
gzip_types       text/plain application/x-javascript text/css application/xml;
gzip_vary on;

#limit_zone  crawler  $binary_remote_addr  10m;

#允许客户端请求的最大单个文件字节数
client_max_body_size     300m;

#缓冲区代理缓冲用户端请求的最大字节数，可以理解为先保存到本地再传给用户
client_body_buffer_size  128k;

#跟后端服务器连接的超时时间_发起握手等候响应超时时间
proxy_connect_timeout    600;

#连接成功后_等候后端服务器响应时间_其实已经进入后端的排队之中等候处理
proxy_read_timeout       600;

#后端服务器数据回传时间_就是在规定时间内后端服务器必须传完所有的数据
proxy_send_timeout       600;

#代理请求缓存区_这个缓存区间会保存用户的头信息以供Nginx进行规则处理_一般只要能保存下头信息即可
proxy_buffer_size        16k;

#同上 告诉Nginx保存单个用的几个Buffer 最大用多大空间
proxy_buffers            4 32k;

#如果系统很忙的时候可以申请更大的proxy_buffers 官方推荐*2
proxy_busy_buffers_size 64k;

#proxy缓存临时文件的大小
proxy_temp_file_write_size 64k;

upstream php_server_pool {
server   192.168.1.10:80 weight=4 max_fails=2 fail_timeout=30s;
server   192.168.1.11:80 weight=4 max_fails=2 fail_timeout=30s;
server   192.168.1.12:80 weight=2 max_fails=2 fail_timeout=30s;
}

upstream message_server_pool {
server   192.168.1.13:3245;
server   192.168.1.14:3245 down;
}

upstream bbs_server_pool {
server   192.168.1.15:80 weight=1 max_fails=2 fail_timeout=30s;
server   192.168.1.16:80 weight=1 max_fails=2 fail_timeout=30s;
server   192.168.1.17:80 weight=1 max_fails=2 fail_timeout=30s;
server   192.168.1.18:80 weight=1 max_fails=2 fail_timeout=30s;
}

#第一个虚拟主机，反向代理php_server_pool这组服务器
server
{
listen       80;
server_name  www.yourdomain.com;

location /
{
#如果后端的服务器返回502、504、执行超时等错误，自动将请求转发到upstream负载均衡池中的另一台服务器，实现故障转移。
proxy_next_upstream http_502 http_504 error timeout invalid_header;
proxy_pass http://php_server_pool; proxy_set_header Host  www.yourdomain.com;
proxy_set_header X-Forwarded-For  $remote_addr;
}

access_log  /data1/logs/www.yourdomain.com_access.log;
}

#第二个虚拟主机
server
{
listen       80;
server_name  www1.yourdomain.com;

#访问http://www1.yourdomain.com/message/***地址，反向代理message_server_pool这组服务器
location /message/
{
proxy_pass http://message_server_pool; proxy_set_header Host  $host;
}

#访问除了/message/之外的http://www1.yourdomain.com/***地址，反向代理php_server_pool这组服务器
location /
{
proxy_pass http://php_server_pool; proxy_set_header Host  $host;
proxy_set_header X-Forwarded-For  $remote_addr;
}

access_log  /data1/logs/message.yourdomain.com_access.log;
}

#第三个虚拟主机
server{
listen	80;
server_name  bbs.yourdomain.com *.bbs.yourdomain.com;

location /
{
proxy_pass http://bbs_server_pool; proxy_set_header Host  $host;
proxy_set_header X-Forwarded-For  $remote_addr;
}

access_log off;
}
}